First and foremost, read/study the layout section of the Oracle Java Swing tutorials. Your problem (I believe) is one of not understanding how to use layouts properly, in this situation the BorderLayout since you appear to be adding more than one component to the BorderLayout.CENTER position of a JPanel that uses Borderlayout, and that won't work.

Please avoid using all-uppercase in your posts here because that is equivalent to SHOUTING.

and if you choose to use this method you should keep watch of the code generated by it and use it as a learning experience. However you will still need a basic grasp of layouts, since it demands you to choose a layout for each component. But at least you can play around with it and visually see the differences.